org.axonframework.commandhandling.annotation

Class ConstructorCommandMessageHandler<T extends AggregateRoot>

java.lang.Object

org.axonframework.common.annotation.AbstractMessageHandler

org.axonframework.commandhandling.annotation.ConstructorCommandMessageHandler<T>

Type Parameters:

T - the type of aggregate this handler handles commands for

All Implemented Interfaces:

Comparable<AbstractMessageHandler>

public final class ConstructorCommandMessageHandler<T extends AggregateRoot>
extends AbstractMessageHandler

Command Handler that creates a new aggregate instance by invoking that aggregate's constructor.

Since:

1.2

Author:

Allard Buijze

Method Summary

Methods

Modifier and Type	Method and Description
static <T extends AggregateRoot> ConstructorCommandMessageHandler<T>	forConstructor(Constructor<T> constructor, ParameterResolverFactory parameterResolverFactory) Creates a ConstructorCommandMessageHandler for the given constructor.
<A extends Annotation> A	getAnnotation(Class<A> annotationType) Returns the member-level annotation of given annotationType, or null if no such annotation is present.
T	invoke(Object target, Message message) Invokes this handler for the given target instance, using the given message as source object to provide parameter values.

Methods inherited from class org.axonframework.common.annotation.AbstractMessageHandler

compareTo, equals, findResolvers, getParameterValueResolvers, getPayloadType, hashCode, matches

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

Method Detail

forConstructor

public static <T extends AggregateRoot> ConstructorCommandMessageHandler<T> forConstructor(Constructor<T> constructor,
                                                                           ParameterResolverFactory parameterResolverFactory)

Creates a ConstructorCommandMessageHandler for the given constructor.

Type Parameters:

T - The type of Aggregate created by the constructor

Parameters:

constructor - The constructor to wrap as a Handler

parameterResolverFactory - The strategy for resolving parameter values of handler methods

Returns:

ConstructorCommandMessageHandler

Throws:

UnsupportedHandlerException - when the given constructor is not suitable as a Handler

invoke

public T invoke(Object target,
       Message message)
                               throws InvocationTargetException,
                                      IllegalAccessException

Description copied from class: AbstractMessageHandler

Invokes this handler for the given target instance, using the given message as source object to provide parameter values.

Specified by:

invoke in class AbstractMessageHandler

Parameters:

target - The target instance to invoke the Handler on.

message - The message providing parameter values

Returns:

The result of the handler invocation

Throws:

InvocationTargetException - when the handler throws a checked exception

IllegalAccessException - if the SecurityManager refuses the handler invocation

getAnnotation

public <A extends Annotation> A getAnnotation(Class<A> annotationType)

Description copied from class: AbstractMessageHandler

Returns the member-level annotation of given annotationType, or null if no such annotation is present.

Specified by:

getAnnotation in class AbstractMessageHandler

Type Parameters:

A - The type of annotation to retrieve

Parameters:

annotationType - The type of annotation to retrieve

Returns:

the annotation instance, or null if no such annotation is present.